$CI_COMMIT_REF_NAME can be a branch name or a tag, depending on the
pipeline, but our checkout script only deals with the former at the
moment.
Address this by rather than looking for a remote branch name, just
try to fetch the ref like we do for merge request pipelines.
Part-of: <https://gitlab.gnome.org/GNOME/gnome-shell/-/merge_requests/1529>
We are currently not very good at communicating what's going in,
in particular for non-merge request pipelines where the output
is usually just "Using origin/master instead" (instead of what?).
Improve this by consistently communicate what we are looking for,
whether we found it, and what we end up doing.
Part-of: <https://gitlab.gnome.org/GNOME/gnome-shell/-/merge_requests/1529>
For stable branches, we currently only check out the correct mutter
branch for merge requests. For the regular pipeline, our code to
determine the current shell branch fails because CI runs on a
temporary "pipeline/12345" branch that doesn't exist for mutter.
Switching to the correct gitlab environment variable fixes that.
https://gitlab.gnome.org/GNOME/gnome-shell/merge_requests/811
Depending on how gitlab's CI checks out gnome-shell, the shell branch
may not have a local reference like "gnome-3-32", but only a remote
one like "remotes/origin/gnome-3-32".
Consider that case as well when looking for a corresponding mutter branch.
https://gitlab.gnome.org/GNOME/gnome-shell/merge_requests/511
If we don't find a branch that matches the branch used in the merge
request, we currently fall back to the non-merge-request matching,
i.e. first try the current shell branch, then fall back to master.
This should work for commits to upstream branches, but not for merge
requests to a stable branch. For those, the target branch name is
a better fallback.
https://gitlab.gnome.org/GNOME/gnome-shell/merge_requests/509
So far we are only performing a basic syntax check on javascript
sources; it's time to test the C code as well. As mutter is tightly
coupled, we bite the bullet and build it as well, either using a
matching branch (if it exists), or current master.
https://gitlab.gnome.org/GNOME/gnome-shell/merge_requests/408
